This study examined whether the quality of first graders' (mean age = 7.2 years) numerical magnitude representations is correlated with, predictive of, and causally related to their arithmetic learning. The children's pretest numerical magnitude representations were found to be correlated with their pretest arithmetic knowledge and to be…

Discusses an adaptive diagnostic test used as part of an instructional program in signed-number arithmetic on the PLATO system. Findings indicated that differences in prior and subsequent instructional methods affected the learning of more advanced materials and produced lower achievement scores on posttests. Thirty-two references are listed. (MER)

Describes a study of Korean elementary school students that was conducted to investigate the effects of differing types of instructional control strategies and cognitive style on achievement in arithmetic skills using computer-assisted instruction. Hypotheses tested are discussed, time on task is investigated, and future research is suggested.…